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Darkblanca · 2023年12月05日

discretionary不是可集中可分散化吗,为什么这道题是systematic的?

NO.PZ2023010903000059

问题如下:

Shaw has particular interest in MFC’s popular Soar Fund (Soar), which relies on returns from factor exposures. The description of the fund states that it emphasizes security-specific factors, maintains low security concentration to keep idiosyncratic risk down, and embraces quality and value styles. Soar occasionally considers the economic and geopolitical environment, especially during unusual economic condi­tions.

From the description of the Soar Fund, the most appropriate classification of its portfolio construction process is:

选项:

A.

top-down systematic

B.

bottom-up systematic

C.

bottom-discretionary

解释:

The Soar Fund has characteristics most consistent with those of a bottom-up systematic manager. Emphasizing security-specific factors is a bottom-method. Targeting low idiosyncratic risk along with low concentrations indicates a systematic approach, not a discretionary approach. Although the Soar Fund does sometimes consider macro data and events, this is not its primary top-down driver of portfolio construction.

A is incorrect. Although Soar does sometimes consider macro data and events, this is not its primary top-driver of portfolio construction.

C is incorrect. Targeting low idiosyncratic risk along with low concentrations indicates a systematic approach, not a discretionary approach.

discretionary不是可集中可分散化吗,为什么这道题是systematic的?

1 个答案

笛子_品职助教 · 2023年12月06日

嗨,爱思考的PZer你好:


discretionary不是可集中可分散化吗,为什么这道题是systematic的?


Hello,亲爱的同学~

同学对于“discretionary不是可集中可分散化吗”这句的理解,正确哦。

根据原版书的知识点,"bottom up + discretionary" 确实可以分散,也可以集中。


但本题的关键信息点,并不是“discretionary确实可以分散,也可以集中”。

之所以选出systematic,而不是discretionay,取决于idiosyncratic risk。


同学注意哈:虽然discretionay是可分散,可不分散,但是对于idiosyncratic risk 的处理,discretionay与systematic是不同的。

idiosyncratic risk是指,公司独特的风险。例如管理层人品如何,能力如何,这就属于idiosyncratic risk。

这个idiosyncratic risk往往有非常主观的特征,因为很难用量化方法去评估管理层的能力。

量化交易,一般回避这样的特定风险,更多抓一些股票里的共性特征,例如quality and value 。

而主观交易,喜欢在idiosyncratic risk上押注,例如管理层能力很强,那么主观交易就会押注,股票价格能涨。


本题的特征是: keep idiosyncratic risk down。降低idiosyncratic risk。因此更符合量化的特征。

这也就是解析:

Targeting low idiosyncratic risk along with low concentrations indicates a systematic approach, not a discretionary approach.的含义。

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就算太阳没有迎着我们而来,我们正在朝着它而去,加油!

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